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Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
The percent defective for parts produced by a manufacturing process is targeted at 4%. The process is monitored daily by taking samples of sizes n = 160 units. Suppose that today's sample contains 14 defectives.
How many units would have to be sampled to be 95% confident that you can estimate the fraction of defective parts within 2% (using the information from today's sample--that is using the result that )?
Finding Mean and Standard Deviation For Presidential Elections
As a part of their testing program Sony tests samples of 25 batteries. What can you say about the shape of the distribution of sample mean?
there are six ways in which a person and the situation interact to shape a persons goals thoughts feelings and
In our example of research on lipstick, where E = $2 and S = $29, what sample size would we require if we desired a 99 percent confidence level? What about if we keep the 95 percent confidence level, but decide that our acceptable error is $4?
Create a frequency table for the total number of people that prefer each type of music:
suppose that two random variables x and y have a joint density function given by fxy and by checking we find that fxy
He will then compare the season batting averages of group A (those with ballet training) and group B (those without ballet training) by comparing the mean of group A with the mean of group B.
if 20 of the residents in a u.s. city prefer a white telephone over any other color available what is the probability
seventy percent of houshold say the would feel secure if they had 50000 in saving. you randomly select 8 houshold and
A certain company relies heavily on phone orders. Suppose past records show that R% of all incoming phone calls to this company are orders from customers.
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
If the total of the accounts receivable is only $1,000,000 (but the standard deviation was correct), what is the probability the total of the sample would be less than $9,900.
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